JPS6022426Y2 - Writing instrument type small electronic calculator - Google Patents

Description

[Detailed description of the invention] This invention relates to a small electronic calculator in the form of a writing instrument.

In recent years, the shapes of small electronic calculators have diversified, and one of them is a writing instrument-shaped small electronic calculator.

This writing instrument type was designed with emphasis on portability, but because the area is limited, the key buttons necessary for calculations must be provided on almost the entire outer periphery of the main body.

Therefore, when performing a key operation, the main body is rotated so that the desired key button is on the top surface, and the key operation is performed.

However, in this case, the display portion also rotates together with the main body, making it difficult for the operator to see the display portion.

Also, it is possible to form all the key buttons on the same plane with respect to the display part, but if this is done, the shape of the main body will be flat or large, making it difficult to hold compared to a cylindrical shape. There is.

This idea was made to eliminate the above drawbacks.
The aim is to provide a writing instrument-type small electronic calculator that is rotatably provided so that the display part always faces upward, thereby improving operability.

This invention will be explained below with reference to embodiments shown in the drawings.

In the figure, reference numeral 1 denotes a cylindrical writing instrument-shaped main body made of metal, synthetic resin, or the like.

One longitudinal end of the main body 1 is a tip, and the display portion 2 is formed by cutting out the upper half of the outer periphery near the central tip by a predetermined length along the axial direction.

The upper surface of this display portion 2 is covered with a transparent member 3 made of transparent synthetic resin or the like.

On the outer periphery of the cylindrical main body 1 from the center toward the rear, a large number of three rows of key buttons 4 are arranged along the axial direction in the circumferential direction, and a power switch 5 is provided at the rear end.

Support walls 6 are formed on both sides of the display portion 2 in the main body 1, and a small rotating cylindrical body 7 (compared to the main body 1) is arranged concentrically with the main body 1 between the two walls 6. is,
Each shaft portion 8 on both sides of the rotating cylindrical body 7 is rotatably supported by the support wall 6.

The upper side of the rotating cylindrical body 7 is notched along the axial direction,
A flat liquid crystal display panel 9 is attached to this notch, and the top surface of this panel 9 is visible to the outside through the transparent member 3.

A printed circuit board 1o is located in the lower part of the cylindrical body 7, and one end side of this board 10 is connected to the opening 1 of the support wall 6.
It is disposed closer to the rear side of the main body 1 than 0a, so that the printed circuit board 10 does not come into contact with the support wall 6 when the cylindrical body 7 rotates with respect to the main body 1.

Further, on the rear side of the printed circuit board 1o, switch contacts for key buttons, LSI, etc. (not shown) are provided.

The printed circuit board 10 and the liquid crystal display panel 9 are electrically connected by a connector 11 which is printed wiring on a flexible film using conductive paint.

Further, a weight 12 is fixed to the lower part of the rotating cylindrical body 7, and a lower inner surface stopper 13 of the main body 1 is fixed.

Stoppers 14 are fixed to the outer circumferential surface of the rotating cylindrical body 7 on both sides of the stopper 13 and spaced apart from the stopper 13 at a constant interval.

Therefore, the rotating cylindrical body 7 has a stopper 14 with respect to the main body 1.
is rotatable within the range in which it contacts the stopper 13 on the main body 1 side.

The usage status of the small electronic calculator configured as described above will be explained.

First, after turning on the power switch 5, press the various key buttons 4.
Calculations are performed by operating the , and the calculation process and results are displayed on the liquid crystal display panel 9 each time, and the numbers etc. displayed on the panel 9 are confirmed by visually observing them through the transparent member 3. .

If the key button 4 to be operated is located above the upper surface of the main body 1 as shown in FIG. 1, the main body 1 is rotated so that the key button 4 to be operated is located on the upper surface.

At this time, the rotating cylindrical body 7 with the liquid crystal display panel 9 attached to the upper part is rotatably supported with respect to the main body 1, and the weight 12 is attached to the lower part, so even if the main body 1 rotates, The liquid crystal display panel 9 always faces upward.

For example, when operating the front row of key buttons 4 such as the 'MCJ key and 1% Yoke key, the main body 1 is rotated as shown in FIG. 4a to position the front row of key buttons 4 on the top surface.

And the key button 4 in the back row such as r() J key, '10, key etc.
When operating the main body 1, as shown in FIG. 4, the key buttons 4 in the rear row are positioned on the top surface.

Even if the main body 1 is rotated in this way, the stoppers 13 and 1
Since the liquid crystal display panel 9 always faces upward while the panels 4 are in contact with each other, the display section can be easily viewed.

In the above embodiment, the main body 1 is cylindrical, but it may be polygonal and the key buttons may be formed in a plane on each side.

Further, the rotating cylindrical body 7 is not limited to a cylindrical shape, and may be any type as long as it can rotate inside the main body 1, and the rotating cylindrical body 7 is not limited to one that rotates around the shaft portions 8, 8. The outer peripheral surface of the rotating cylindrical body 7 may be rotated while slidingly contacting the inner surface of the main body 1.

The point is that the weight of the rotating cylindrical body 7 with respect to the center of rotation is unbalanced and is greatest at a portion on the opposite side than on the display portion side.

As explained in detail above, this design allows the display to always face upwards even when the main unit is rotated depending on the position of the key buttons being operated, etc., so the display is always in a position that is easy for the operator to see, improving operability. do.

It also has the effect of making the main body portable and easy to hold.

[Brief explanation of drawings]

Figure 1 is a plan view of one embodiment of this invention, and Figure 2' is a plan view of one embodiment of this invention.
An enlarged cross-sectional view taken along line A-A in the figure, Figure 3 is B-- in Figure 1.
Enlarged sectional view along line B, FIG. 4a. b is a plan view showing the open side in use. 1...Main body, 2...Display part, 3...
...Transparent member, 4...Key button, 5...
...Switch, 6...Supporting wall, 7...
Rotating cylindrical body, 8... Shaft part of the cylindrical body 9...
...Liquid crystal display panel, 10...Printed circuit board,
12... Weight, 13.14... Stopper.

Claims (1)

[Scope of utility model registration request] A writing implement type small electronic calculator has a hollow cylindrical main body with key buttons on the outer periphery, a display part is provided on one side of the outer periphery, and a rotating body that can rotate within the hollow cylinder of the main body is arranged. , and the rotating body has a maximum weight with respect to the center of rotation at a part on the opposite side of the display part,
A writing instrument-type small electronic calculator, characterized in that the display portion always faces upward when rotated within a predetermined range along the outer peripheral surface of the main body.